Science

Thursday, 23 July 2026
13 facts about tears
13 facts about tears
Multipurpose liquid
Associated with emotions, tears are a product of lacrimal glands, found in the eyes of most terrestrial vertebrates. Although their primary function i ...

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lava
Lava is molten or partially molten rock (magma) that has risen to the surface as a result of an eruption.
The hot, molten mass of silicates and aluminosilicates, mixed with oxides and sulfides, with large amounts of water and gases, formed lava as it rose to the surface.
Silver
Silver is a chemical element with the symbol Ag, belonging to the group of transition metals (gold, platinum) in the periodic table.
The Latin name for silver is argentum.
Earth
Although it's hard to believe, the Earth's crust consists of 47 percent oxygen.
It is trapped in the soil in the form of various oxides, the most common of which are: silicon dioxide, aluminum oxide, calcium oxide, magnesium oxide, and iron oxide.
Tears
Tears are made up of three layers.
Oily layer–smoothens the tear’s surface and prevents evaporation of other layers Mucous layer–allow ...
Earth
It is similar with the oceans - depending on the divisions, there are from three to five of them.
We distinguish oceans: Pacific, Atlantic, Indian, Southern, and Arctic. The basic ones are considere ...
Snow
In 2008, there was a violent snowstorm in Afghanistan.
Temperatures there dropped to – 30 degrees Celsius, and up to 180 centimeters of snow fell in most o ...
Aurora
The greatest intensity of auroras occurs at maximum solar activity - this happens every eleven years.
Then you can observe auroras also in Europe.
Silver
Silver does not react with clean air and water.
However, it becomes dull upon contact with ozone, hydrogen sulfide, and air polluted with sulfur compounds. Silver halides slowly decompose when exposed to light.
Milky Way
It is almost as old as our Universe.
Its age is estimated at 13.6 ± 0.8 billion years, so it may be only 100 million years younger than the Universe.
Anorexia Nervosa
Anorexia is the most common among young people and teenagers.
It is most common in girls and young women, although recently the disorder has been increasingly obs ...